Accumulating evidence points to the mitigation of cellular senescence as a critical component of prolonged health span. As discussed in previous posts, cellular senescence is characterized by a state of cell-cycle arrest induced by myriad stressors, such as DNA damage, oxidative stress, and mitochondrial impairment. Transient, adaptive senescence is pivotal during times of acute wound healing, embryogenesis, and tumor initiation. However, dysfunctional targeting and clearance of these transient cells by the immune system perpetuates a chronic inflammatory environment that contributes to progressive functional decline. Creatine has recently been proposed to combat cellular senescence due to its role in energy metabolism, redox balance, and age-related signaling pathways.
As a brief review, creatine can be endogenously synthesized or derived from the diet. Creatine synthesis is largely confined to the liver, kidneys, and pancreas from the components arginine, glycine, and s-adenosylmethionine as a methyl donor. Arginine-glycine amidinotransferase (AGAT) and guanidinoacetate methyltransferase (GAMT) are the two key enzymes catalyzing the reaction. Creatine can subsequently be circulated and taken up by cells expressing the sodium-dependent creatine transporter 1 (CRT1). As a core molecule of the ATP-phosphocreatine (ATP-PCr) energy system, creatine is most robustly absorbed and stored by the high energy cells of the brain, muscle (both skeletal and cardiac), retina, and gonads. The ATP-PCr system is able to rapidly replenish ATP during times of energetic stress, with phosphocreatine acting as a high-energy phosphate reservoir. Creatine is thereby not only fundamental for muscular contraction, but also neuronal health and cellular repair. Disruption of the ATP-PCr system has thus been correlated with diminished brain bioenergetics and cognitive function, impaired immune response and inflammatory resolution, and poor physical performance.
Given the relationship between intracellular energy depletion and cellular senescence, as well as the observation that creatine levels gradually fall with age, creatine is being studied as a potential anti-aging molecule. Creatine repletion may rescue cells from senescence and programmed cell death by restoring energy balance. Creatine additionally bolsters against the oxidative damage induced by reactive oxygen species, acting to neutralize superoxide anions and peroxynitrite. Furthermore, creatine has been noted to modulate inflammatory pathways and suppress immune cell recruitment. Supplemental creatine inhibits both prostaglandin E2 and tumor necrosis factor-alpha, suggesting that it may play a part in attenuating the inflammatory signaling triggered by senescence-associated signaling phenotype (SASP) factor release.
Moreover, creatine has been shown to interfere with the cellular-stress response pathway p53/p21 implicated in senescence. Activation of p53/p21 elicits cell cycle arrest and initiates the SASP, resulting in heightened inflammatory signaling. The antioxidant properties of creatine mitigate DNA damage and consequent oxidative stress-induced p21 expression to prevent cellular senescence. Furthermore, research indicates that creatine represses p53 and downstream pro-apoptotic factor release, including caspase-3, caspase-9, and Bax. Creatine thereby behaves as a potent buffer against stress-induced cell death.
Creatine additionally exhibits a regulatory function over the mTOR/p70S6K, PI3K/Akt, and p38 MAPK pathways associated with cell differentiation and stress-induced senescence. Cellular remodeling and differentiation rely on a considerable energy source to fuel growth, development, and maturation. Activation of Akt drives anti-apoptotic and anti-senescent signaling to protect against senescence. Akt stimulation also cascades down to induce mTOR, potentiating cell differentiation. Creatine boosts energy availability and inhibits p21, ensuring stem cell progression through the cell cycle. Creatine also exerts a temporal impact on the p38 pathway, reducing it initially only to increase it later on as cells mature.
In addition, creatine influences mTOR signaling in such a way as to confer similar anti-senescence effects as those seen with caloric restriction. In stressful, energy-sensitive conditions, creatine averts chronic over-activation of the cell cycle and improves energy management. Modulation of mTOR suppresses interleukin-1 alpha translation to attenuate the SASP, forcing damaged cells into a stable state of permanent growth arrest. Creatine thus halts the progressive degradation that elicits chronic, systemic inflammation.
Evidence is suggestive of a novel application for creatine in the context of anti-aging and cellular senescence. Complementing other anti-senescent therapies with creatine is an especially compelling area of research. Researchers have proposed the combination of administering creatine with senolytics to ameliorate cellular and mitochondrial function, and to amplify senescent cell eradication. Future studies should evaluate the long-term effects and optimal dosing strategies for specific disease conditions and populations. Further investigation is needed to fully elucidate the mechanistic underpinnings of creatine’s influence on pathways of senescence.
Ostojic SM, Prémusz V, Ács P. Creatine and cellular senescence: from molecular pathways to populational health. Exp Gerontol. 2025;207:112798. doi:10.1016/j.exger.2025.112798
Su Y. Three-dimensional network of creatine metabolism: From intracellular energy shuttle to systemic metabolic regulatory switch. Mol Metab. 2025;100:102228. doi:10.1016/j.molmet.2025.102228